Functions - Toshiba e-STUDIO281c Service Manual

10.3 Functions

1) Pickup roller (Drawers and bypass feed)
This roller moves up and down and draws out the paper from the bypass tray or drawer and trans-
port it to the feed roller.
2) Feed roller (Drawers and bypass feed)
This roller is placed against the separation roller. It transports the paper from the pickup roller to the
transport roller.
3) Separation roller (Drawers and bypass feed)
This roller is placed against the feed roller. When two sheets of paper or more are transported from
the pickup roller, the load of the torque limiter of the separation roller is heavier than the frictional
force between the sheets. As the result, the separation roller is stopped and the lower paper is not
advanced any further. When only one sheet is transported from the pickup roller, the separation
roller rotates following the feed roller.
4) Transport roller (Drawers and bypass feed)
This roller transports the paper sent from the feed roller to the registration roller.
5) Registration roller
Paper transported from the transport roller is pushed against the registration roller which aligns the
leading edge of the paper.
Then, the registration rollers rotate to transport the paper to the transfer unit.
6) Bypass paper sensor (S35)
This sensor detects if paper is set in the bypass tray. If it is, bypass feeding always comes before
drawer feeding.
7) Empty sensor (Upper drawer (S29) / Lower drawer (S30))
This is a transmissive-type sensor and detects the availability of paper in the drawer by using an
actuator. When there is no paper in the drawer, the actuator blocks the light path of the sensor, and
the sensor determines that there is no paper.
8) Paper stock sensor (Upper drawer (S31) / Lower drawer (S32))
This is a transmissive-type sensor which detects the amount of the remaining paper in the drawer
using an actuator. When the remaining paper is consumed and becomes around 100 sheets, the
actuator blocks the light path for the transmissive-type sensor to notify that the paper is getting
fewer.
9) Feed sensor (Upper drawer (S23) / Lower drawer (S24) / bypass (S36))
This sensor detects if the leading edge or trailing edge of the paper has passed the feed roller. It
also detects jamming such as misfeeding.
10)Registration sensor (S22)
This sensor detects that the leading edge of the paper has reached the registration roller and the
trailing edge of the paper has passed the registration roller.
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e-STUDIO281c/351c/451c
PAPER FEEDING SYSTEM
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